EP0237179B1 - Verfahren zur Brikettierung von Kohle - Google Patents

Verfahren zur Brikettierung von Kohle Download PDF

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Publication number
EP0237179B1
EP0237179B1 EP87301072A EP87301072A EP0237179B1 EP 0237179 B1 EP0237179 B1 EP 0237179B1 EP 87301072 A EP87301072 A EP 87301072A EP 87301072 A EP87301072 A EP 87301072A EP 0237179 B1 EP0237179 B1 EP 0237179B1
Authority
EP
European Patent Office
Prior art keywords
coal
process according
hardening agent
briquettes
briquetting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP87301072A
Other languages
English (en)
French (fr)
Other versions
EP0237179A3 (en
EP0237179A2 (de
Inventor
Joseph Goleczka
Walter Harris
John Pringle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Publication of EP0237179A2 publication Critical patent/EP0237179A2/de
Publication of EP0237179A3 publication Critical patent/EP0237179A3/en
Application granted granted Critical
Publication of EP0237179B1 publication Critical patent/EP0237179B1/de
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders

Definitions

  • This invention concerns a coal briquetting process, and more especially it concerns a process for "cold" briquetting.
  • the briquettes exhibit good water resistance to prevent degradation during open air stocking.
  • Binders which are in use in the British Isles or have been suggested for cold briquetting processes include bitumen, starch and resin combinations, binders based on polyvinyl alcohol, eg. PVA/calcium oxide (see GBP2138442), PVA/molasses (Europatent 0135784), PVA/calcium carbonate (Europatent 0135785) molasses and lime, molasses and phosphoric acid (GBP 230306) and binders based on sulphite lye, eg. sulphite lye, sodium dichromate and sulphuric acid (Europatent 0127351).
  • PVA/calcium oxide see GBP2138442
  • PVA/molasses Europatent 0135784
  • PVA/calcium carbonate Europatent 0135785
  • molasses and lime molasses and phosphoric acid
  • GBP 230306 binders based on sulphite lye, e
  • the present invention provides a cold coal briquetting process comprising mixing fine coal with a binder comprising 5-15% molasses and up to 5% of an inorganic hardening agent for the molasses selected from calcium carbonate, calcium phosphate, iron oxide and aluminium oxide, optionally together with an acid, all percentages being by weight of the mix, and briquetting the mix.
  • This invention further provides briquettes formed using the process.
  • Preferred coals are high rank non-caking coals, especially those having low smoke emissions such as anthracite.
  • the coal is of a particle size mainly below 3mm, and anthracite duff is especially suitable.
  • the invention is also applicable to coals for power stations or steam raising and to coal blends containing caking coal components and/or treated coals, e.g. by mild oxidation or by pyrolysis.
  • the coal may be crushed or be the direct product of coal cutting.
  • Molasses is readily available at a much lower price than synthetic resins, and cane or beet molasses may be used.
  • the hardening agents calcium carbonate, calcium phosphate ferric oxide and aluminium oxide are readily available at low price in such forms as limestone, phosphate rock, bauxite and iron ore. These may be used alone or together in total amounts of 0.5 to 3%. Phosphoric acid or sulphuric acid may be used in amounts of up to 2% in admixture with any one or more of calcium phosphate, calcium carbonate, ferric oxide and aluminium oxide. Routine testing should, of course, be carried out to ensure that any individual coal/binder mix is satisfactory.
  • the briquetting step of the present invention includes all methods of forming agglomerates from fine coal, and these agglomerates may be of any size or shape according to market requirements. There may be mentioned forming agglomerates by extrusion, ringroll- or roll-pressing, die-pressing, rotary table pressing and pelletising, eg on a disc pelletiser.
  • the process preferably includes a hardening stage to permit the green briquettes to gain strength.
  • the green briquettes harden over a period of 1 to 3 days at ambient temperature to give adequate crushing strengths, but the briquettes tend to have inadequate water resistance.
  • the briquettes may be bagged in impervious sacks and allowed to further harden during storage.
  • a hot curing step is included to speed up the hardening stage and to make the briquettes water resistant, and this may be carried out at temperatures of the order of 200 to 300 ° C for up to an hour.
  • Hot curing may be conveniently carried out by passing the briquettes on a conveyor through an oven, in an inert or partially inert gas atmosphere which may contain any of nitrogen, carbon dioxide, water vapour and oxygen. It is to be noted that the hot curing step does not correspond to a carbonisation step, and thus not only are there energy savings, but the solid yield on a dry basis is very high. Additionally, there is a reduced risk of pollution.
  • the release of the green briquettes from the press moulds may be improved, if desired, by pre- warming the moulds and/or by sprinkling coal fines or graphite uniformly across the press surface in contact with the mix prior to and during the briquetting of the mix.
  • the water resistance and appearance of the briquettes may be improved by an additional treatment with a spray or bath of a waterproofing agent.
  • a spray or bath of a waterproofing agent Several agents are known or have been proposed including, for example, aluminium acetate.
  • a fine anthracite from South Wales, was prepared by drying crushing and screening to - 3mm.
  • the anthracite was admixed with 8% molasses, 1% limestone and 1% iron ore, by wt of the final composition, and was briquetted in a pilot plant roll-press.
  • the green briquettes were cured at 250 ° C for 1 hour under nitrogen and after cooling were found to have a 74 kg crushing strength. However, the briquettes were severely weakened after soaking for 24 hours in cold water.
  • Example 1 The process described in Example 1 was repeated, but using 8% molasses and 2% iron ore as binder. Similar strengths, but improved water resistance were found.
  • Example 2 The process described in Example 1 was repeated, but using 8% molasses, 1 % iron ore and 1 % phosphoric acid. A crushing strength of 115 kg was measured, and excellent water resistance was observed.
  • Example 2 The process described in Example 1 was repeated, but using 10% molasses, 2% iron ore and 1% phosphoric acid. A crushing strength of 142 kg was measured and excellent water resistance was observed.
  • Example 2 The process described in Example 1 was repeated, but using 8% molasses, 1 % bauxite and 1 % phosphoric acid. A crushing strength of 109 kg was measured, and excellent water resistance was observed.
  • the fine anthracite as described in Example 1 was admixed with 8% molasses and either a mixture of 1% calcium carbonate and 1% ferric oxide or with 2% ferric oxide and briquetted using a mould-and-plunger press. After three days of open dry storage, the respective crushing strengths of the briquettes were 88 kg and 136 kg. However, no complete briquettes were found in either case after 24 hours immersion in water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Claims (12)

1. Verfahren zur Kaltbrikettierung von Kohle, bei dem eine Feinkohle mit einem Bindemittel gemischt und die Mischung brikettiert wird, dadurch gekennzeichnet, daß das Bindemittel Molasse in einer Menge zwischen 5 und 15 Gewichtsprozent der Mischung gemeinsam mit einem Härtemittel enthält, welches aus der aus Eisenoxyd, Kalziumcarbonat, Kalziumphosphat und Aluminiumoxyd bestehenden Gruppe, wahlweise zusammen mit einer Säure besteht.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kohle eine hochwertige, nichtbackende Kohle ist.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Kohle der Siebdurchfall von Anthrazit ist.
4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Kohle eine Kraftwerks- oder Dampfkesselkohle ist.
5. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Härtemittel aus einem oder mehreren Stoffen der aus Eisenerz, Bauxit, Phosphatgestein und Kalkstein bestehenden Gruppe besteht.
6. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Härtemittel in einer Menge zwischen 1 oder 3 Gewichtsprozent der Mischung verwendet wird.
7. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Härtemittel zusätzlich bis zu 2 Gewichtsprozent der Mischung Phosphorsäure oder Schwefelsäure enthält.
8. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß eine Härtestufe der Briketts nach der Brikettierung eingeschlossen wird.
9. Verfahren nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Briketts in einem Heißtrocknungsschritt behandelt werden.
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß in dem Heißtrocknungsschritt die Briketts bis zu einer Stunde auf etwa 200 bis etwa 300°C erhitzt werden.
11. Kohlebrikett aus einer Feinkohle und einem Bindemittel, dadurch gekennzeichnet, daß das Bindemittel Molasse in einer Menge zwischen 5 und 15 Gewichtsprozent des Briketts ist, und daß ein Härtemittel aus der aus Eisenoxyd, Kalziumcarbonat, Kalziumphosphat und Aluminium bestehenden Gruppe wahlweise zusammen mit einer Säure gewählt wurde.
12. Kohlebrikett nach Anspruch 11, dadurch gekennzeichnet, daß das Härtemittel bis zu 2 Gewichtsprozent Phosphorsäure oder Schwefelsäure enthält.
EP87301072A 1986-03-14 1987-02-06 Verfahren zur Brikettierung von Kohle Expired EP0237179B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868606332A GB8606332D0 (en) 1986-03-14 1986-03-14 Coal briquetting process
GB8606332 1986-03-14

Publications (3)

Publication Number Publication Date
EP0237179A2 EP0237179A2 (de) 1987-09-16
EP0237179A3 EP0237179A3 (en) 1987-12-16
EP0237179B1 true EP0237179B1 (de) 1990-10-31

Family

ID=10594601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87301072A Expired EP0237179B1 (de) 1986-03-14 1987-02-06 Verfahren zur Brikettierung von Kohle

Country Status (5)

Country Link
US (1) US4738685A (de)
EP (1) EP0237179B1 (de)
JP (1) JPS62220591A (de)
DE (1) DE3765805D1 (de)
GB (2) GB8606332D0 (de)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2198451B (en) * 1986-12-02 1990-08-29 Coal Ind Briquette treatment process
GB8707223D0 (en) * 1987-03-26 1987-04-29 Coal Industry Patents Ltd Coal briquetting process
GB8721757D0 (en) * 1987-09-16 1987-10-21 Coal Industry Patents Ltd Coal briquetting process
GB8725263D0 (en) * 1987-10-28 1987-12-02 L A W Construction Co Ltd Fuel briquettes
GB8725252D0 (en) * 1987-10-28 1987-12-02 Coal Industry Patents Ltd Briquetting process
DE3821950A1 (de) * 1988-06-29 1990-01-04 Bp Benzin Und Petroleum Ag Verfahren zur herstellung von wasserfesten kohleformlingen
GB2227023A (en) * 1989-01-12 1990-07-18 Coal Ind Briquetting process
EP0385665A3 (de) * 1989-02-25 1990-12-19 Ryan International Plc Briketts
GB8915866D0 (en) * 1989-07-11 1989-08-31 Ryan International Plc Fuel briquettes
FR2664611B1 (fr) * 1990-07-16 1993-07-16 Avebene Aquitaine Procede pour la fabrication d'agglomeres et produits obtenus.
GB9105208D0 (en) * 1991-03-12 1991-04-24 Cerestar Holding Bv Starch composition
US5244473A (en) * 1992-01-22 1993-09-14 Sardessai Kashinath S Process for making moisture resistant briquettes
DE4212452C2 (de) * 1992-04-14 1995-02-09 Sophia Jacoba Gmbh Kaltbrikettierte Kohle
FR2711994B1 (fr) * 1993-11-05 1996-01-26 Sivia Procédé de fabrication d'un aggloméré combustible résistant aux intempéries, aggloméré combustible et aggloméré intermédiaire ainsi obtenus.
US6375690B1 (en) 1995-03-17 2002-04-23 The Curators Of The University Of Missouri Process for forming coal compacts and product thereof
US5658357A (en) * 1995-03-21 1997-08-19 The Curators Of The University Of Missouri Process for forming coal compact without a binder
CA2241574C (en) * 1997-08-01 2004-01-06 Exothermic Distribution Corporation Composite briquette for electric furnace charge
US6214064B1 (en) * 1997-08-13 2001-04-10 Edward E. Boss Process for making a fuel product from coal fines and sewage sludge
US5916826A (en) * 1997-12-05 1999-06-29 Waste Technology Transfer, Inc. Pelletizing and briquetting of coal fines using binders produced by liquefaction of biomass
US6506223B2 (en) 1997-12-05 2003-01-14 Waste Technology Transfer, Inc. Pelletizing and briquetting of combustible organic-waste materials using binders produced by liquefaction of biomass
US6709472B1 (en) 2000-03-10 2004-03-23 Arthur Ferretti Insolubly bound particulate products
KR100627469B1 (ko) * 2000-12-19 2006-09-22 주식회사 포스코 강도가 우수한 용융환원 제철공정용 성형탄 및 그 제조 방법
JP3935332B2 (ja) * 2001-08-30 2007-06-20 株式会社神戸製鋼所 成型炭の製造方法
KR100905581B1 (ko) * 2001-12-21 2009-07-02 주식회사 포스코 제철공정용 성형탄과 그 제조방법
WO2004063315A1 (en) * 2003-01-09 2004-07-29 Brickett Technologies Limited Handling of coal fines
EP2883943A1 (de) 2013-12-16 2015-06-17 Arigna Fuels Limited Herstellung von Brennstoffbriketts aus thermisch aufbereiteter Biomasse
CN111004660B (zh) * 2019-12-25 2021-04-16 王研 一种燃煤高温原位助燃方法

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US713512A (en) * 1902-02-25 1902-11-11 Joseph Simons Fuel briquet.
GB190221615A (en) * 1902-10-04 1903-08-06 Herbert Leroy Mitchell An Incandescent Smokeless Fuel.
US990348A (en) * 1910-07-05 1911-04-25 Ellis Briquet Binder Fuel-briquet and method of making same.
US1507673A (en) * 1923-04-21 1924-09-09 Nagel Theodore Agglomerated finely-divided material and process of producing the same
DE423798C (de) * 1923-09-28 1926-01-09 Henri Du Boistesselin Verfahren zum Brikettieren von Kohlenstaub und anderen Brennstoffen
GB222449A (en) * 1923-09-28 1925-05-14 Henri Du Boistesselin Process for agglomerating coal dust and other powdered fuels
GB230306A (en) * 1924-05-05 1925-03-12 Theodore Nagel Improvements in or relating to briquettes and the process of producing the same
GB229905A (en) * 1924-05-05 1925-03-05 Theodore Nagel Improvements in or relating to binding materials
US1676729A (en) * 1925-01-22 1928-07-10 Crocker Bertram Erwin Process for making synthetic carbonaceous coke briquettes for metallurgical uses
US1994378A (en) * 1933-03-17 1935-03-12 Battelle Memorial Institute Iron-bearing briquette and method of making the same
US2110370A (en) * 1935-07-09 1938-03-08 Stonega Coke And Coal Company Carbonaceous fuel and method of preparing the same
FR1303391A (fr) * 1961-10-04 1962-09-07 Procédé de fabrication d'agglomérés fumivores, et les produits obtenus par la mise en oeuvre de ce procédé
ZA834208B (en) * 1982-06-22 1985-01-30 British Petroleum Co Plc Process for the production of agglomerated fuels

Also Published As

Publication number Publication date
GB2187754A (en) 1987-09-16
GB2187754B (en) 1989-11-15
JPS62220591A (ja) 1987-09-28
DE3765805D1 (de) 1990-12-06
EP0237179A3 (en) 1987-12-16
US4738685A (en) 1988-04-19
EP0237179A2 (de) 1987-09-16
GB8703410D0 (en) 1987-03-18
GB8606332D0 (en) 1986-04-23

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